[Info-vax] how to get the time of any timezone (C or VMS RTL/system services/etc.)

[Pierre]

On May 2, 7:19 pm, Jim <mckinn... at saic.com> wrote:
> On May 2, 11:59 am, Pierre <pierre.... at gmail.com> wrote:
>
> > hi,
>
> > for historical reasons, my machine time is UTC [I can not change
> > this].
> > is it possible using C or VMS RTL/system services/etc. to get the
> > "local time" (the one of my wall clock) ?
> > as all the logicals point to UTC, I must be able to specify the
> > requested timezone... :-/
>
> > I'm running VMS 7.3-2, 8.3, 8.4
>
> > TIA, Pierre
>
> Perhaps the example below will help...
>
> #include <stdio.h>
> #include <stdlib.h>
> #include <string.h>
> #include <time.h>
>
> int main (int argc, char *argv[])
> {
> time_t t;
> typedef struct tm tm_t;
> tm_t *tml;
> tm_t *tmr;
>
> setenv ("TZ", "US/EASTERN", 1);
> tzset();
> t = time((time_t)0);
> tml = calloc( sizeof(tm_t), 1 );
> tmr = localtime_r(&t,tml);
> printf("US/EASTERN: %d-%02d-%02d-%02d:%02d:%02d.%03d\n",
>         tml->tm_year+1900, tml->tm_mon+1, tml->tm_mday,
>         tml->tm_hour, tml->tm_min, tml->tm_sec,
>         (0));
> free(tml);
>
> setenv ("TZ", "JAPAN", 1);
> tzset();
> t = time((time_t)0);
> tml = calloc( sizeof(tm_t), 1 );
> tmr = localtime_r(&t,tml);
> printf("Japan: %d-%02d-%02d-%02d:%02d:%02d.%03d\n",
>         tml->tm_year+1900, tml->tm_mon+1, tml->tm_mday,
>         tml->tm_hour, tml->tm_min, tml->tm_sec,
>         (0));
> free(tml);
> }

oh ! I though only the systemwide  TZ was taken into account. thanks
for the info :)

Pierre.